My first bike was a 1985 Honda Magna 700. It was in excellent condition when I bought it in 1994 for $1450. It had 18K miles. I sold it two years later for $1750.
I've heard the V45 and V65 motors are notorious for cam chain problems but I never had any problem. The only maintenance I did:
Sync the carbs (which made a big difference)
Adjusted the valve clearances
Replaced the speedo cable (broke after about 3K miles)
I think the forks started leaking oil around the seals, but I can't remember. Nothing major wrong with the bike. VERY easy to work on
I'd offer him $1900 - $2200
EDIT: I misread your post... I thought it read "1986 Magna"
Oh well